People who continue to vote democrat or republican and complain when nothing changes. Then when they admit we need a third party, but follow up the statement "voting third party is throwing your vote away."

I have a better question for you. In a prior episode Tess jumps from present to future and past, during which she is informed by the future crew of 'the year of hell' and at the end of the episode she tells Captain Janeway that she needs to warn her about said enemy. How come they didn't take heed then?